Hello everybody! We built the tool “DNS Resolver Recommender”: * https://dns.diic-hpi.org It is a small DoH measurement tool that should catch DNS behavior from the user’s browser. It measures a list of 200+ public DoH resolvers for both cached and uncached domains and recommends the best one for the user. Upon opt-in, we also collect the (anonymized) measurement data for research (see the Privacy Disclosure<https://dns.diic-hpi.org/privacy.html>). We made every effort to collect only data that maintains privacy. In the future, we also want to release snapshots of our data to the community. Therefore, I am writing to this mailing list: We would greatly appreciate it if you tried the tool and, if you feel comfortable, also activate the opt-in to support our research work. Thank you in advance! Best regards, Robert
On 10/08/2026 14:59, Richter, Robert via dns-wg wrote:
Hello everybody! We built the tool “DNS Resolver Recommender”:
Hello Robert, is this tool really just IPv4-only? Not only that there is no AAAA for this domain name: $ host dns.diic-hpi.org dns.diic-hpi.org has address 46.225.184.21 dns.diic-hpi.org has HTTP service bindings 1 . alpn="h3,h2" But also in the results, I only see IPv4 addresses even for services very well known to support IPv6 like Cloudflare DNS: Cloudflare 1.1.1.1 public resolver. Global anycast, non-filtering. Operated by Cloudflare. Service page: https://developers.cloudflare.com/1.1.1.1/ DoH URL https://dns.cloudflare.com/dns-query System IP 1.0.0.1 Country Global -- Ondřej
Hi, I can see IPv6 results, but I also see resolvers without ip. Please see the attached screenshots. /Ulrich -- Sent from Canary (https://canarymail.io)
On Tuesday, Aug 11, 2026 at 9:59 AM, Ondřej Caletka <Ondrej.Caletka@ripe.net (mailto:Ondrej.Caletka@ripe.net)> wrote: On 10/08/2026 14:59, Richter, Robert via dns-wg wrote:
Hello everybody! We built the tool “DNS Resolver Recommender”:
Hello Robert,
is this tool really just IPv4-only?
Not only that there is no AAAA for this domain name:
$ host dns.diic-hpi.org dns.diic-hpi.org has address 46.225.184.21 dns.diic-hpi.org has HTTP service bindings 1 . alpn="h3,h2"
But also in the results, I only see IPv4 addresses even for services very well known to support IPv6 like Cloudflare DNS:
Cloudflare 1.1.1.1 public resolver. Global anycast, non-filtering. Operated by Cloudflare. Service page: https://developers.cloudflare.com/1.1.1.1/
DoH URL https://dns.cloudflare.com/dns-query
System IP 1.0.0.1
Country Global
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Moin! On 10 Aug 2026, at 14:59, Richter, Robert via dns-wg wrote:
We built the tool “DNS Resolver Recommender”:
It is a small DoH measurement tool that should catch DNS behavior from the user’s browser. It measures a list of 200+ public DoH resolvers for both cached and uncached domains and recommends the best one for the user. Upon opt-in, we also collect the (anonymized) measurement data for research (see the Privacy Disclosure<https://dns.diic-hpi.org/privacy.html> ). We made every effort to collect only data that maintains privacy. In the future, we also want to release snapshots of our data to the community.
If you release a tool called “DNS Resolver Recommender” you should also include the resolver people are actually using which in most cases is there ISP resolvers. I would always recommend to use those as there usually is the lowest latency between you and the resolver, plus a lot of ISP also started to publish RFC9462 (DDR) upgrade records, so you could even use them via DoH. So long -Ralf --- Ralf Weber
participants (4)
-
Ondřej Caletka -
Ralf Weber -
Richter, Robert -
Ulrich Wisser